Improvement in knife-sharpeners



THOMAS K. KNAPPV Improvement in Knife-Sharpeners.

No 127,170, Patented May28 ,1872.

lmllllllll UNITED STATES PATENT OFFICE.

THOMAS K. KNAPP, OF DANSVILLE, NEW YORK.

IMPROVEMENT IN KNlFE-SHARPENERS.

Specification forming part of Letters Patent No. 127,170, dated May 28,1872.

To all whom it may concern:

Be it known that I, THOMAS K. KNAPP, of Dansville, in the county ofLivingston and State of New York, have invented a new and usefulImprovement in Knife-Sharpeners; and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawing and to the letters of reference markedthereon.

Figure 1 represents a side view of my device complete. Fig. 2 representsthe metal case with its central tubular arbor. Fig. 3 represents thesteel disk or cutter. Fig. 4 represents a transverse central section ofmy knife-sharpener.

My improved knife-sharpener consists in the combination of a reversibleadjustable diskcutter, provided with two separate beveled edges aroundits periphery, with a double-slotted case provided with a tubular arbor,as herein more fully described.

The case A is providedwith a socket, B, for the handle 0, and the twolips a and slots a, which serve as guides or gauges to govern theposition of the knife while being sharpened by the use of the sharpener.The periphery of the disk-cutter or steel D is made with a centralgroove, 00, around its periphery so as to form the two separate angularedges 41 0 thereon. These beveled edges extending around the peripheryof the steel disk D are clearly represented in sectional Fig. 4.

When the steel disk D is inserted in case A the arbor b will enter thecentral hole through the disk and the set-screw E will be inserted inthe arbor toretain it in any position to which it may be adjusted. Thearbor will permit the rotary adjustment of the steel disk from time totime to present new surfaces to be used for sharpening knives; and whenone of the beveled sharpening-edges around the periphery of the disk Ebecomes dulled from long use this steel disk may be reversed in the caseto bring the other sharpening-edge upon its periphery into use.

It will be readily understoood that to use my sharpener a person mayclasp it, by its handle G, in one hand and with the other hand draw-theedge of a knife against the steel disk E. The edge of the knife willoccupy or be drawn through the extremity of the acute angles of slots 0/when being sharpened, and altern ately be drawn through each slot, thelips a a serving as guides against which the blade of the knife willslide during the process of sharpening.

The groove :0 andopening in the rim of the case A serve to admit thefree discharge of clogging matter, which might otherwise accumulate andchoke the cutter.

Having fully described the construction and manner of using myknife-sharpener, what I claim as my invention is- 1. The combination ofthe adjustable revers ible steel disk E, provided with the two angularedges 11 0 and groove :1: around its periphery, with the case A,constructed in the manner and for the purpose specified.

2. The tubular arbor l) and lips a a of the sharpenercase A incombination with the disk for sharpening knives, substantially asspecified.

In testimony hereof I have hereto set my hand this 14th day of March, A.D. 1872.

THOS. K. KNAPP.

Witnesses:

H. P. K. PEGK, W. H. HUBBARD.

